JWT Decoder

How to use the JWT Decoder

1. Paste your JWT token into the input field, or click "Load sample token" to try a demo.
2. View the decoded header, payload, and signature instantly in color-coded panels.
3. Check the expiration badge to see if the token is active, expired, or has no expiry.
4. Copy individual sections or download the full decoded JSON for your records.

FAQ

Is my JWT sent to a server?

No. All decoding happens locally in your browser. Your token never leaves your device.

Does this tool verify the JWT signature?

No. This is a decoder only — it reads the token contents but does not cryptographically verify the signature.